with the charts of all four oceans before him, Ahab was threading a maze of currents and eddies, with a view to the more certain accomplishment of that monomaniac thought of his soul.
Now, to any one not fully acquainted with the ways of the leviathans, it might seem an absurdly hopeless task thus to seek out one solitary creature in the unhooped oceans of this planet. But not so did it seem to Ahab, who knew the sets of all tides and currents; and thereby calculating the driftings of the sperm whale's food; and, also, calling to mind the regular, ascertained seasons for hunting him in particular latitudes; could arrive at reasonable surmises, almost approaching to certainties, concerning the timeliest day to be upon this or that ground in search of his prey.
when making a passage from one feeding-ground to another, the sperm whales, guided by some infallible instinct—say, rather, secret intelligence from the Deity—mostly swim in VEINS, as they are called; continuing their way along a given ocean-line with such undeviating exactitude, that no ship ever sailed her course, by any chart, with one tithe of such marvellous precision.
For there and then, for several consecutive years, Moby Dick had been periodically descried, lingering in those waters for awhile, as the sun, in its annual round, loiters for a predicted interval in any one sign of the Zodiac. There it was, too, that most of the deadly encounters with the white whale had taken place; there the waves were storied with his deeds; there also was that tragic spot where the monomaniac old man had found the awful motive to his vengeance.
Monsoons, Pampas, Nor'-Westers, Harmattans, Trades; any wind but the Levanter and Simoon, might blow Moby Dick into the devious zig-zag world-circle of the Pequod's circumnavigating wake.
But granting all this; yet, regarded discreetly and coolly, seems it not but a mad idea, this; that in the broad boundless ocean, one solitary whale, even if encountered, should be thought capable of individual recognition from his hunter, even as a white-bearded Mufti in the thronged thoroughfares of Constantinople? Yes. For the peculiar snow-white brow of Moby Dick, and his snow-white hump, could not but be unmistakable.
Ah, God! what trances of torments does that man endure who is consumed with one unachieved revengeful desire. He sleeps with clenched hands; and wakes with his own bloody nails in his palms.
crazy Ahab, the scheming, unappeasedly steadfast hunter of the white whale
Therefore, the tormented spirit that glared out of bodily eyes, when what seemed Ahab rushed from his room, was for the time but a vacated thing, a formless somnambulistic being, a ray of living light, to be sure, but without an object to colour, and therefore a blankness in itself. God help thee, old man, thy thoughts have created a creature in thee; and he whose intense thinking thus makes him a Prometheus; a vulture feeds upon that heart for ever; that vulture the very creature he creates.